Which statements about subatomic particles are true? a. If an atom has an equal number of protons and electrons, it will be charge-neutral. b. Electrons are attracted to protons. c. Electrons are much lighter than neutrons. d. Protons have twice the mass of neutrons.

검증된 단계별 안내

Identify the subatomic particles: protons, neutrons, and electrons.

Understand that protons are positively charged, electrons are negatively charged, and neutrons have no charge.

Recognize that an atom is charge-neutral when the number of protons equals the number of electrons, as their charges cancel each other out.

Recall that electrons are attracted to protons due to opposite charges, following Coulomb's law.

Know that electrons have much less mass compared to protons and neutrons, and that protons and neutrons have similar masses, with protons not being twice as massive as neutrons.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Charge Neutrality

An atom is considered charge-neutral when it has an equal number of protons, which are positively charged, and electrons, which are negatively charged. This balance results in no overall charge, making the atom stable. If the number of protons and electrons differs, the atom becomes an ion, carrying a positive or negative charge.

Attraction Between Protons and Electrons

Electrons are negatively charged subatomic particles that are attracted to positively charged protons in the nucleus of an atom. This electrostatic attraction is fundamental to the structure of atoms, as it helps to keep electrons in orbit around the nucleus, contributing to the stability of the atom.

Mass of Subatomic Particles

In terms of mass, protons and neutrons are roughly equal, with protons having a mass of about 1 atomic mass unit (amu) and neutrons slightly more. Electrons, on the other hand, are significantly lighter, with a mass approximately 1/1836 that of a proton. This difference in mass is crucial for understanding atomic structure and behavior.